If it helps its not just a girl thing. I was mad at myself for awhile for letting myself get manipulated, conned, abused, railroaded...etc.
And I'm a big tough no nonsense guy.
I was hard on myself for letting her have the inner me that wasn't tough, wanted to show her I could make her better....blah blah blah.
Yes you feel like a stupid idiot.
But you will get over it.
Its like a poison that got into your system. It takes a while to get that out of your system.